US 11,806,780 B2
Arcuate seed casting method
Dilip M. Shah, Glastonbury, CT (US); Shiela R. Woodard, South Windsor, CT (US); Steven J. Bullied, Pomfret, CT (US); and Ryan C. Breneman, Newington, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Sep. 30, 2021, as Appl. No. 17/490,399.
Application 17/490,399 is a division of application No. 17/062,035, filed on Oct. 2, 2020, granted, now 11,198,175.
Claims priority of provisional application 62/936,196, filed on Nov. 15, 2019.
Claims priority of provisional application 62/911,121, filed on Oct. 4, 2019.
Prior Publication US 2022/0016697 A1, Jan. 20, 2022
Int. Cl. B22D 27/04 (2006.01); C30B 11/14 (2006.01); B22D 21/02 (2006.01)
CPC B22D 27/045 (2013.01) [B22D 21/025 (2013.01); C30B 11/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A casting method comprising:
forming a seed, the seed having a first end and a second end, the forming including bending a seed precursor;
placing the seed second end in contact or spaced facing relation with a chill plate;
contacting the first end with molten material; and
cooling and solidifying the molten material so that a crystalline structure of the seed propagates into the solidifying material,
the forming further comprising:
reducing a thickness of the seed proximate the first end relative to a thickness of the seed proximate the second end, wherein the reducing is along an inner diameter face and an outer diameter face of the seed.